<template>
    <div>
      <!-- 面包屑导航栏 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>数据统计</el-breadcrumb-item>
        <el-breadcrumb-item>数据报表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 数据表卡片显示区域 -->
      <el-card>
        <!--  2.为ECharts准备一个具备大小（宽度）的Dom -->
        <div id="main" style="width: 700px;height: 400px"></div>
      </el-card>
    </div>
</template>

<script>
// 1.导入 echarts
import echarts from 'echarts'
import _ from 'loadsh'
export default {
  data() {
    return {
      // 需要合并的options
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  // 此时，页面上的元素，已经被渲染完毕
  async mounted() {
    // 3.基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.querySelector('#main'))

    const { data: res } = await this.$http.get('reports/type/1')
    if (res.meta.status !== 200) return this.$message.error('获取数据表失败')

    // 4.准备数据 配置项
    const result = _.merge(res.data, this.options)

    // 5.展示数据
    myChart.setOption(result)
  }
}
</script>

<style scoped>

</style>
